0.5 grams of Calcium was reacted with 0.01 L of a 2.5 M Phosphoric Acid What is the balanced chemical equation, limiting reactant, How many moles of hydrogen gas, and how many liters produced assuming the pressure is 1.01 atm and the temperature is 300 K.
Then what is the % yield if you only produced .98 grams of calcium phosphate?

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.